The suburban shift toward the Democrats helps explain why they're about to take control of the House. The graphic below shows the shift — and it shows that even the deep-red rural districts elected Republicans with smaller margins than in 2016.

Why it matters: Races tend to be much closer in the suburbs, and that's where Democrats picked up the most seats. With few exceptions, Democrats in conventionally blue districts won by larger margins than Clinton in 2016 and Republicans won by slimmer margins than Trump in 2016.

How to read this chart: A CityLab data project categorized every U.S. House district by the density of its neighborhoods. By comparing the margin victory for Hillary Clinton or Donald Trump in 2016 to the vote margin in the 2018 midterms, we can see which districts shifted to the left or right by comparison.

  • Districts with higher Democratic or lower Republican margins point left; those with smaller Democratic or higher Republican margins point right. The color of each arrow shows who won the district in 2018.
Expand chart
Note: This chart includes only the 393 districts where both a Republican and Democrat ran in 2018. Data: CityLab and Associated Press; Chart: Chris Canipe/Axios

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Amy Coney Barrett's immediate impact

Illustration: Eniola Odetunde/Axios

In her first week on the job, Amy Coney Barrett may be deciding which votes to count in the presidential election. By her third week, she’ll be deciding the fate of the Affordable Care Act.

Where it stands: The Senate votes on Barrett’s nomination tomorrow. If she’s confirmed, Chief Justice John Roberts is expected to swear her in at the Supreme Court within hours, an administration official tells Axios.

Texas Democrats beg Biden to spend now

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The Biden campaign is rebuffing persistent pleas from Texas Democrats to spend at least $10 million in the Lone Star state, several people familiar with the talks tell Axios.

Why it matters: If Texas — which has 38 electoral votes and is steadily getting more blue, but hasn't backed a Democrat for president since 1976 — flipped to the Biden column, it would be game over. But the RealClearPolitics polling average stubbornly hovers at +2.6 for Trump — and Team Biden appears more focused on closer targets.